|Job:||Spy for the Galactic Federation|
|Family:||Tammy Gueterman (daughter)|
|Relationships:||Donna Gueterman (wife)|
|First seen in:||The Wedding Squanchers|
|Main voice actor:||James Callis|
Pat Gueterman is the father of Tammy and is first introduced in the episode The Wedding Squanchers during her wedding to Bird Person. He and his wife Donna introduce themselves to Beth and Jerry during the wedding's reception.
Later, it is revealed that Pat, Donna, and Tammy are agents for the Galactic Federation. Pat and Donna are not humans and are shown as deadly robots. The two of them directly pursue the Smith family as they attempt to escape. Pat slips on a group of earthworms and falls out of the back of a spaceship from a great height.
- Pat's likeness is a direct reference to the character Gaius Baltar in the sci-fi series Battlestar Galactica. He is voiced by the actor of this character, James Callis.